Fuel Pressure after engine is off???

[RGCintha29073]

So, i replaced my bad fuel pump with a TREPerformance pump.

http://www.ebay.com/itm/330505860704...84.m1423.l2649

Now the vehicle is starting to get hard to start. After attaching a fuel pressure gauge and observing the pressure. Right after I turn off the vehicle the fuel pressure drops straight to 0! Normal? Is there a return valve in the line that is stuck open? Shouldn't there be some pressure after?

[jlevie]

It sounds like your TRE pump doesn't have a check valve in it. The OE pump does. If the OE pump and FPR are good, the rail will remain pressurized for a really long time.

[RGCintha29073]

Thanks. Thats what i thought but wasnt sure. Ill be looking for another pump here soon.

[E30-325iS]

You can buy a check valve for a few dollars. Part number is in this thread.

http://www.r3vlimited.com/board/showthread.php?t=77514

[jlevie]

Thanks. Thats what i thought but wasnt sure. Ill be looking for another pump here soon.

Just get an OE pump and be done with it.

[E30-325iS]

Just get an OE pump and be done with it.

You're right,of course, that would be the best solution.
I remembered seeing that thread, and was trying to provide a cheap alternative.

[RGCintha29073]

Thanks. Seems the valve is MIA so looks like it will be a pump. I may try to look it up on my ETK program and see if the part number has changed.

[sayed ali]

I used the 2jz-gte pump replacing the stock one in tank, it's stronger, better response, no hard starts, no pressure drops, cheap ..